Invcntqr



j. A. SCHOFlEL,

LOCK NUT,

APPLICATION FILED MAY 29, 1919.

hmmm@ wmv/5835s ...mamma-man li ttll til., ll ll hpplication tiled ldap 29, 1919.

and one oit the principal objects, thereot is to utilise a soft ring' of dnctile material in connection witha hard compression. ring, hot-h contained in the nut, for securing a binding action between the threads oli the compression ring;1 oi the nnt and the holt.,

the'soft ring ahont the threads ot the holt, thereby retaining the not in position on ther holt in' such manner as to prevent its haelt dll dill

dii

' section.

Another ohject or the invention is to nee in connection with the nett9 a hard ring threaded into the net9 whichv ring; is in tnrn interiorly threaded to contorrnto the pitch" or the threads ot' the holt, the threads hetween the nut and the riep; heine; ot a greater pitch than those ot the holt7 whereby when the loch nut is in position, a compression he Ween the threads ol' the not and the holt and the ring; and the holt will taire plane, thiscompression eirertinp; itsell in opposite directions longitudinally' el? the anis oit the holt7 thereby hindingthe not in place and preventing its accidental rernovah ,et further object ol the invention is to provide an improved loch nnt which "will he exceedingly simple, dnrahle and ellicient in. operation and inexpensive to naannliactnre.

With these and other ohjects in view which will become apparent as the description proceeds, the invention resides inthe construction, combination and arrangement oit parts hereinafter more folly described and claimed, and illustrated in the accom-- panying drawing, in whiehm.n n

rlhe figure represents a vievv showing;1 Va nut in operation, the same heine", shown in llieterrinp` more particularly to the dravvn ing, a holt is indicated-at 5, and thev worlr through which the holt extends is indicated at 6. The loch nnt l is hored at its inner end, the diameter ot the hore losingn greater than that oit the Usual threaded opening d the opening 8 are the saine pitch as those cr-tending through the nut., Il`he threads (Specification et Letters tatent.

and in addition thereto, a bindingf action oliL lm'atented dept., log ldld.

eener ne. acatar. I

oi the holt 5, and the bore is interiorljf threaded at 9, the pitch of the threads heing; greater than the pitch 0l the 4holt e threads.

lin the 'hottorn of the here portion of the nut, a lead or other soit metal ring l0 is cast cold under pressure. 'llhis ring is then threaded to torni a continuation oi the threads 8 or the nut., lnto the bore above the ring l0 is turned a hard compression ring ll made of iron or steel or other snitahle material which is threaded on its i11- side to conform to the pitch of the threads or the holt, and is threaded on its outside,

to contorni to the pitch ot' the threads 9 ot the nut. llt will thus he understood that the nnt 7 and ringr l0, and ring ll are internally threaded the threads heilign 0i' aI pitch to conform to the pitch ofthe threads ot the holt 5.

ln operation, the nut with the sott and hard rings assembled therein is screwed doven on the holt. its soon as the hard ring ll; engages the vverlr it will cease to'rotate relatively tothe holt. Under the increased torce or the Wrench, the nut will he screwed down :iarthen ln moving; farther alone,r the holt, it will travel raster along the threads of the ring1 ll which is now stationary than down the threads or the holt. 'lhis will canse a compression. of the holt threads hetvveen the nnt '3 and the hard ring` ll, the compression exerting itseliz in opposite directions, that,1u is, in a direction toward. the head ot the holt, as shown in the figure, hetvvee'n the nnt l and the holt, and away from the head el? the holt hetvveen the hard ring: ll and the holt. 'l`hus the threads olf the holt will he hound between the nut and the hard ring. ln addition to the locking action thus caused, the soft ring` .10, by reason of the movement or the nut relative to the hard ring ll, will he compressed and will .flow

out laterally to hind tightly and grip the threads ot the holt, and 'thereby torni an additional lock between the holt and the not; 'lhis compression or the soft'ring, will also tend tohind the ring l1 against nieve-- inns-t first be used to rr eve the pressure on` the holt hv hacldnp the nut slightly. lit the riepF il should then stick, the hac-king dit ' point the relative binding` action of motion would be continued to bring the threads of the bolt 'under tension. At this the nut the ring to Then a slight and the hard ringwould cause turn relatively to the bolt.

. reverse turn of the nut will relieve the tension,

and a continuation of the backing Inotion,

the tension having been relieved, andthe hard ring having' been started on the threads of the bolt, will cause the withdrawal of the nut from the bolt, the inw tu1ninowith the nut. The soft rinfr will Although I have described the preferred embodiment of my inventionI may desire te make such changes in the construction, combination and arrangement of parts thereof as do not depart from the spirit of .ter of the opening, y being thepinvention or the scope of the appended claims.-

' ing in the nut, substantially as described..

having a softring and a hard ring arranged in a recess in the nut, said soft and, hard rings being -interiorly lthe nut, beingof l 1n the nut.

threaded to conform t0 the pitch of the threads in the nut, the recess in which the soft and hard rings are arranged being internally threaded, said soft and hard rings being exteriorly threaded to conform to the threads of the recess, the threads of the recess being of a greater pitch than the threads of the nut.

3. A lock nut having an interiorly threaded opening. said nut being bored at one end, the bore being interiorly threaded, the threads of the bore and of the opening` in different pitch` and a ring threaded into the bore and provided with a. threaded opening, thel threads of the Opeliing of the ring conforming in pitch to the threads of the opening in the nut.

4. A lock nut having a threaded opening and having a threaded bore of. greater dian1- eter than the opening, the threads oi the :opening and bore of the nut being of different pitch, a soft ring arranged in the bore, and a hard ring threaded into the bore above the soft ring, said soft and hard rings bcing interiorly threaded at al pitch to coliform to the pitch of the threads of the opening 5. A lock nut having a threaded opening and having a threaded'bore'of greater dialneter than the opening, and a pair of ring: one of 'relatively hard and the other of rel atively soft material threaded into the bore, both rings being interiorly threaded to forni a continuation of the rthreaded opening in the nut.

JOHN A. SCHOFIELD. 

